Not content to sit by any longer and watch Amazon.com's (AMZN 2.77%) own online holiday sales, brick-and-mortar retailers like Wal-Mart (WMT -0.52%), Nordstrom (JWN), and Best Buy (BBY 3.69%) are bringing the fight to Amazon's door. In this segment of Investor Beat, Motley Fool analyst Jason Moser and consumer expert Dayana Yochim talk about where you can get the best deals online and which retailers are best positioned to grow their share of the online retail pie.